i'm using the same software, i.e. Feurio 1.65.5
so, as you can see there, in the settings section the writing speed for Black Memorex 1x-24x is unfortunately limited to 24x
and no manufacturer could be defined neither.

To me it looked like it would be much safer if i burnt those at 20x or lower, 'cos once i simulated writing at 24x, the burning failed at the point of 45' 10''